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Advanced Search. Corning, incorporated in August 1877, was the first of Clay County's two seats (Piggott is the other). Corning is the judicial seat for the countyâs Western District and is the commercial and educational center of western Clay County. There is little record of western Clay Countyâs earliest settlers.
Corning, Iowa - Basic Facts. The City of Corning had a population of 1,592 as of July 1, 2016. The primary coordinate point for Corning is located at latitude 40.9928 and longitude -94.7397 in Adams County. The formal boundaries for the City of Corning (see map below) encompass a land area of 1.59 sq. miles and a water area of 0 sq. miles.